Acid-valve.



R. T. EVANS & W. G. NORD. A GID VALVE. APPLICATION FILED 00T.19, 1911'.

WITNEssEs: /0 @emwmxwlbg 1 A1-voguer# Y UNITED STATES .PATENT oEEicE.

msnm 'i'. Evans .um WALTER e. Nomi',- or YouNes'rowN; omo'.

ACID-VALVE.

- as strong acids, which cause a rapid corrosion of the usual metalsemployed in theJ ordinary valve -mechanism.

To the accomplishment of these and related ends, said invention, then,consists of the means hereinafter fully described 4and particularlypointed out in the claims.-

The annexed drawing and the following description set forth in detailcertain mech- -anism embodying our invention, such disclosed meansconstituting, however, but onel of the various mechanical forms in whichthe principle of the-invention may be used. In said annexed drawingsz-'the figure isa central longitudinal section through ^our improvedvalve mechanism illustrating i the construction and""rrangement ofparts..y In the ligure the valve casing 1 is shown having threechambers, in.one of which is disposed a valve seat 2 and in another astoper 3 for closin said seat, the third cham- Eer being the inletchamber.

The stopper is held in a cup-like terminal 4 .of the reciprocatingmember 5 which is mounted in the valve casing and is threaded A40- atthe upper end, adaptin it to be reciproo prevent the incated by ahand-wheel 6. troduction ofacidinto the upper part of lthe casing inwhich it would attack the threadying on the reciprocable member, weplace a washer 7 around the same in th casing,

thereby preventing an;r such action. The

valve seat 2 will be formed of any suitable acidresisting soft metal,such as lead. The lead seat is held firmly in place'in thecasing '50 bymeans of grooves 9 which are'cut in the sides of the casing.V Theleadenters the same, roviding a simple and effective means (forkho dingthe seat in lace. The `stop er 3 vly'll be madeof porce ain, glass, orot er A ac'dl.1 resisting material and will be heldinthe cup 4 by meansof lead or other suitable peeioation of Letters Patent. y Ap'pumion meaoctober 1a, i911. serial No. 655,597.

and residents of Youngstown', county iPatented'Apnli, 1913.

' material which is poured into "the cup-like member around the stopper3. Grooves 8` .on the inner face of the cup-shaped member and the outerface of the stopper will be filled with the lead, and the stopper -willthus be held firmly in the cup-shaped member; The latter willnecessarily be made of anI ordinary metal, and may be coated withparaiinor like preparation, which will revent any'corroding action by the acid.n like manner that part of the member 5 which enters the valve chamberIproper lwill be coated with paraiiin to prevent the action of the acid.

The stopper of porcelain or glass will, of course, be considerablyharder than'the lead of the seat, andthe grinding action ot the stopperin seating will tend to keep tho, seat true, Y thus preventing anyleakage flue' to the slight action of the acid on the lead.

The seat will be of a considerable length extending for the whole lengthof one cf the chambers'of the casing, and the stopper is so mounted inthe second of these chambers that it may be reciprocated a vdista .iceequal to the length of this seat, thus permitting of the engagement ofthe seat by the stopper seat. In this way the valve is adapted to last along time, since it can close at all 'times until the seat is worn forits whole length. The rinding action of the stopper 4in seating wil 'ofcourse, always keep the closure tight. As the seat wears laway and thestopperfollows downthe seat, it will be evident that the cup-liketerminal 4 of ythe reciprocating member will also contact the seat, andthat further wear of the seat can only take place if the stopper` andthe cn'p.

`at all times irrespective of the wear `on the like `terminal togetherare adapted to wear away the seat. 'The materia-l of which the cup isconstructed is adapted to wear away the seat as well as the stopper 3..In this way the stopper is adapted to seat the whole lengthjotheseat.'4 l

.The valve casing is formed with an outwardly extending angeell. We useay companion ange 10l which ext-ends inwardly and is of the same insidediameter as the ioo lead seat. This revents the lead from slipping downand 1s attached tothe iiange 11 by bplts inserted in the apertures 12 insaid two flanges ,A

We are aware that various valves have beemconstructed to be used withacids, but

they have generally been made with a lead seat and a lead stopper whichwill obviously not give the results which are claimed for ourconstruction.

lhe advantage of always having a 'tight closure, obtained by having avery dee seat which is being const-:mtl ground by the action et' thestopper Will e apparent.

Other modes of applying the rinciple of our invention may be employedpinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means stated by any ofthe followingclaims or the equivalent of such stated means be employed.

WV e therefore particularly point out and distinctly claim as ourinvention l. An acid valve, comprising a seat of soft. arid-resistingmaterial, a reciprocably mounted member adapted to be reciprocated adistance substantially equal to the depth ol said seat, and anacid-resisting stopper harder than said seat, whereby said soft seat iskept true by the grinding action of said harder stopper in seating, saidstopper being reciprocated to adapt it to the Wearing away of said seat,thereby utilizing substantially Ithe whole of the same.

L. ln a valve 'easing having a plurality of chambers, the combination ofa seat of amd-resisting material extending substanmeme' tiallythe Wholelength of one of said chambers; a reciprocabl mounted member adapted tocontact saidY seat irrespective of the Wear of the same, whereby saidvalve may be closed until said seat is substantially destroyed.; and anacid-resisting stopper garder than said seat attached to said mem- In avalve casing having a plurality of chambers, one of said chambers havinginternal grooves in the walls thereof, the combination ot' a seatof softacid-resisting material extending the Whole length of said groovedchamber, such material filling said grooves, thereby securely retainingsaid seat in place, a member reciprocably mounted in another ot saidchambers; and a porcelain stopper attached to said member and adapted tocontact said seat irrespective of the wear of the same, whereby saidvalve may be closed until said seat is substantially destroyed.

Signed by us this 16th day of October, 1911.

ROBERT rr. Evans. WALTER e. NcRiu. Attested by- WM. Hier, W. H. WILsON.

